UV radiation

The ultraviolet radiation (better known as UV-radiation) is a electromagnetic radiation with a wavelength between 100nm and 400nm. UV-radiation is not perceivable by human senses.

Subdivision based on wavelength (DIN 5031, part 7)

  • UV-A-radiation (wavelength 400 - 315nm)
  • Immediately follows the visible light
  • Typical example: iron-doped mercury radiators
  • LED-technology
  • UV-B-radiation (wavelength 315 - 280nm)
  • UV-C-radiation (wavelength 280 - 100nm)
  • Is adjoining the area of ionising radiation
  • Part of the UV-radiation with the highest energy

The radiation spectrum can be affected due to the doping of the mercury radiators (mercury vapour medium pressure emitter) via indium, gallium, iron or lead. Mercury radiators are used in wood technology since the 1970s.

Light emitting diodes are used as a further way of artificial radiation for surface coating of wood since the end of the 2000s. A wavelength of about 200nm to about 450nm is used for the hardening process (photopolymerisation) of varnish- , colour- and glue coats.

Further radiation sources, e.g. excimer lamps, were progressively used in the area of surface hardening via UV-radiation.

Images

Elektromagnetisches Spektrum (Wikipedia)
2008
UV-Strahler (Ultralight AG)
2007
Gallium - Spektrum (Hönle Group)
Eisen/ Iron - Spektrum (Hönle Group)
Gallium-Indium - Spektrum (Ultralight)
2007
LED-Spektrum (Hönle Group)
2013